Zone management and hybrid automatic repeat request for sidelink in a wireless communication system

1. A method comprising:

receiving, by a first wireless device from a base station, a radio resource control (RRC) message comprising a list of sidelink configurations for sidelink communications, wherein each of the sidelink configurations comprises a communication range threshold for sidelink transmissions; and

transmitting, by the first wireless device to one or more second wireless devices, sidelink control information (SCI) comprising:

a first index, in the list of the sidelink configurations, indicating one of the communication range thresholds of the sidelink transmissions; and

a zone identifier indicating a geographic location of the first wireless device.

2. The method of claim 1 , further comprising transmitting a transport block (TB), based on the SCI, to the one or more second wireless devices.

3. The method of claim 2 , further comprising receiving a feedback message, based on the TB, from the one or more second wireless devices in response to a distance between the first wireless device and the one or more second wireless devices being smaller than the communication range threshold indicated by the SCI.

4. The method of claim 1 , wherein the communication range threshold, in the SCI, is based on a communication range of the sidelink transmissions.

5. The method of claim 1 , further comprising determining, based on the communication range threshold in the SCI, a zone configuration.

6. The method of claim 1 , further comprising determining the first index, for the SCI transmission, wherein the first index corresponds to:

a communication range threshold, of a plurality of communication range thresholds, based on a communication range of the sidelink transmissions; and

a zone configuration, of a plurality of zone configurations, associated with the communication range threshold.

7. The method of claim 1 , further comprising determining the zone identifier of a zone, of the first wireless device, based on the geographic location and a zone configuration of a plurality of zone configurations.

8. The method of claim 1 , wherein the sidelink configurations comprise zone configurations and communication range thresholds, wherein each of the sidelink configurations comprise a zone configuration, of the zone configurations, for the sidelink transmissions corresponding to the communication range threshold of the communication range thresholds.

9. The method of claim 8 , wherein the zone configuration comprises a length parameter.

10. The method of claim 8 , wherein a sidelink configuration of the sidelink configurations comprises:

an index, of the sidelink configuration, associated with:

the zone configuration of the zone configurations; and

the communication range threshold of the communication range thresholds;

the zone configuration; and

the communication range threshold.

11. A wireless device comprising:

one or more processors; and

memory storing instructions that, when executed by the one or more processors, cause the wireless device to:

receive, by a first wireless device from a base station, a radio resource control (RRC) message comprising a list of sidelink configurations for sidelink communications, wherein each of the sidelink configurations comprises a communication range threshold for sidelink transmissions; and

transmit, by the first wireless device to one or more second wireless devices, sidelink control information (SCI) comprising:

a first index, in the list of the sidelink configurations, indicating one of the communication range thresholds of the sidelink transmissions; and

a zone identifier indicating a geographic location of the first wireless device.

12. The wireless device of claim 11 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to transmit a transport block (TB), based on the SCI, to the one or more second wireless devices.

13. The wireless device of claim 12 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to receive a feedback message, based on the TB, from the one or more second wireless devices in response to a distance between the first wireless device and the one or more second wireless devices being smaller than the communication range threshold indicated by the SCI.

14. The wireless device of claim 11 , wherein the communication range threshold, in the SCI, is based on a communication range of the sidelink transmissions.

15. The wireless device of claim 11 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to determine the first index, for the SCI transmission, wherein the first index corresponds to:

a communication range threshold, of a plurality of communication range thresholds, based on a communication range of the sidelink transmissions; and

a zone configuration, of a plurality of zone configurations, associated with the communication range threshold.

16. The wireless device of claim 11 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to determine the zone identifier of a zone, of the first wireless device, based on the geographic location and a zone configuration of a plurality of zone configurations.

17. The wireless device of claim 11 , wherein the sidelink configurations comprise zone configurations and communication range thresholds, wherein each of the sidelink configurations comprise a zone configuration, of the zone configurations, for the sidelink transmissions corresponding to the communication range threshold of the communication range thresholds.

18. The wireless device of claim 17 , wherein the zone configuration comprises a length parameter.

19. The wireless device of claim 17 , wherein a sidelink configuration of the sidelink configurations comprises:

an index, of the sidelink configuration, associated with:

the zone configuration of the zone configurations; and

the communication range threshold of the communication range thresholds;

the zone configuration; and

the communication range threshold.

20. A system comprising:

a base station comprising: one or more first processors and first memory storing first instructions that, when executed by the one or more first processors, cause the base station to:

transmit a radio resource control, RRC, message comprising a list of sidelink configurations for sidelink communications, wherein each of the sidelink configurations comprises a communication range threshold for sidelink transmissions;

a first wireless device comprising: one or more second processors and second memory storing second instructions that, when executed by the one or more second processors, cause the first wireless device to:

receive, from the base station, the RRC message comprising the list of sidelink configurations; and

transmit sidelink control information (SCI) comprising:

a first index, in the list of the sidelink configurations, indicating one of the communication range thresholds of the sidelink transmissions; and

a zone identifier indicating a geographic location of the first wireless device; and

a second wireless device comprising: one or more third processors and third memory storing second instructions that, when executed by the one or more third processors, cause the second wireless device to:

receive, from the first wireless device, the SCI comprising:

the first index indicating the communication range threshold corresponding to the sidelink configuration of the list of sidelink configurations; and

the zone identifier indicating a geographic location of the first wireless device.